import CryptoJS from 'crypto-js'

export default {
  //随机生成指定数量的16进制key
  generatekey(num) {
    let library = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
    let key = ''
    for (var i = 0; i < num; i++) {
      let randomPoz = Math.floor(Math.random() * library.length)
      key += library.substring(randomPoz, randomPoz + 1)
    }
    return key
  },

  encrypt(word, keyStr) {
    keyStr = keyStr ? keyStr : 'yuyi181823456789'
    var key = CryptoJS.enc.Utf8.parse(keyStr) //Latin1 w8m31+Yy/Nw6thPsMpO5fg==
    var srcs = CryptoJS.enc.Utf8.parse(word)
    var encrypted = CryptoJS.AES.encrypt(srcs, key, {
      mode: CryptoJS.mode.ECB,
      padding: CryptoJS.pad.Pkcs7
    })
    return encrypted.toString()
  },
  //解密
  decrypt(word, keyStr) {
    keyStr = keyStr ? keyStr : 'yuyi181823456789'
    var key = CryptoJS.enc.Utf8.parse(keyStr) //Latin1 w8m31+Yy/Nw6thPsMpO5fg==
    var decrypt = CryptoJS.AES.decrypt(word, key, {
      mode: CryptoJS.mode.ECB,
      padding: CryptoJS.pad.Pkcs7
    })
    return CryptoJS.enc.Utf8.stringify(decrypt).toString()
  }
}
